Furnace.



PATENTED MAR. 7, 1905.

1). D. HUGHES.

FURNACE.

APPLICATION FILED DBO. 20, 1904.

Witnesges o r Rttomegs STATES Patented March '"Y, 1905.

PATENT FFICE.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 784,048, dated March '7, 1905.

Application filed December 20, 1904. Serial No. 237,691.

To all when), it may con/007 11 Be it known thatl, DnNIs D. Heel-Ins, acitizen of the United States, residing at Titusville, in the county of Crawford and State of Pennsylvania, have invented a new and useful Furnace, of which the following is a specification.

This invention relates to hot-air furnaces;

and it has for its object to present a device of this class of simple inexpensive construction and which shall be especially adapted for the crmsumption of gas as a fuel.

With those and other ends in view, which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described, and particularly pointed out in the claims.

In the accompanyingdrawing has been illustrated a simple and preferred form of em bodiment of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that the right is reserved to any changes, alterations, and modifications to which recourse may be had within the scope of the invention and without departing from the spirit or sacrificing the efliciency of the same.

The single figure of the drawing represents a perspective View of a furnace constructed in accordance with the principles of the invention, parts having been broken away for the purpose of exposing the interior construc tion.

The furnace-box of this device consists of a sheet-metal cylinder 1, having a flat bottom 52 and a conical top 8, the latter terminating at the apex thereof in a cylindrical flange or collar 4. Above the furnace-box is arranged a radiating drum or cylinder 5, the bottom of which has a central opening 6, surrounded by a depending annular flange or collar 7, which exteriorly engages the collar 4 at the apex of the furnacebox. The latter is preferably supported at a suitable elevation from the floor by means of legs 8. Within the drum 5 and supported above the central opening 6 is a conical deflector 7, and 1n the top of sald drum, near one edge thereof, is an opening 8, surrounded by a flange or collar 9.

is a supi-irimposed radiating-drum the bottom of which is provided near one edge with an opening 11, surrounded by a flange or collar 12, which exteriorly engages thei'langc or collar 9 of the drum 5. The bottom of the drum- 10 is provided at the side diametrically oppositefrom the opening 11 with an opening 13, with which is connected a flue or pipe 14-, through which the products of combustion are conveyed to the chimney or to a point of [inal exit.

Suitably connected with the lower drum 5 are a plurality of braces 15, the lower ends of which. have been shown as engaging sock.- ets 16 upon the conical top of the furnacebox. By this construction the weight of the radiating-drums will be supported in such a manner that the parts may be readily disconnected when desired for the purpose of cleaning or repairing the same.

The furnace-box and the drums or radiators are surrounded by an exterior cylindrical casing 17 which rests upon the floor and which is provided at its upper end with openings 18, surrounded by collars 19, with which may be connected pipes for conducting the air which is heated by radiation from the furnace-box and the radiating-drums to the apartments to be heated. The casing 17 is preferably built up of a plurality of sections, the loweri'nost of which is reinforced at its lower edge by a flange-iron 20, which is L-shaped in cross-section. The adjacent edges of the sections are separated by flange-irons 21. which are ap proximately T-shaped in cross-section. By this construction the parts of the furnace-eas ing may be conveniently assembled or disassembled, and a simple and ei'licient construction is obtained. The upper portion of the furnace-casing has an interior lining 22, of bright tinned iron or steel, and between the latter and the furnace-casing proper is interposed a lining 23, of asbestos or equivalent non-conductive material. Loss of heat by radiation from the furnace-casing is thereby avoided. The asbestos lining may be made to abut upon one of the flange-irons 21, which will prevent it from being readily displaced.

The furnace-casing has an opening 24, surrounded by a flange 25, for the passage of the flue 14.

The furnace-box 1 is provided with one or more door-openings 26, which are connected by flanges or collars 27 with registering openings 28 in the casing 17, the latter openings being provided with doors 29, through which access may be had to the interior of the furnace-box. The latter also has an opening 30, connected by a pipe 31 with an opening 32 in the furnace-casing, which is for the admission of air to support combustion. A slotted tubular stop 33 is arranged in the pipe 32 for the purpose of regulating the air-supply. The furnace-box and the casing are also provided below one of the furnace-doors with openings 34 and 35, connected by a flange or collar 36, said openings being for the passage of a slide or drawer 37, upon which the burner or burners 38 are supported, this construction being resorted to for the purpose of enabling said burners to be conveniently removed for the purpose of inspection or repairs. These burners, which may be of any suitable well-known construction, are to be connected with the source of gas-supply in any convenient manner, which is no partot' the present invention.

Cold air is admitted from without to the interior of the casing 17 through an opening 38 near the lower end of said casing, said opening being surrounded by a flange 39, with which is connected an air-inlet pipe 40,which may be extended to a source of supply of pure air.

The operation and advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawing hereto annexed.

The improved furnace is particularly intended to be used in districts where there is a supply of natural gas and where, consequently, this gas is largely utilized for heating purposes. By this invention a device is provided in which the gas will be economically consumed and at the same time very effectively, so far as the production of heat is concerned.

The device is preferably constructed throughout of sheet metal.

It is obvious that the burner may be regulated to consume more or less gas, according to the degree of heat that it may be desired to produce. It is likewise obvious that the supply of air required for admixture with gas to support combustion may also be very easily regulated by means of the very simple device provided for the purpose. The products of combustion in an intensely-heated state will rise from the furnace-box into the radiatingdrums, which thus become intensely heated,

the radiated heat being absorbed by the air within the casing, which being thus charged with heat is conveyed through the pipes provided for the purpose to the apartments that are to be heated. The products of combustion are compelled to pass from the upper radiating-drum 10 in a downward direction and through the pipe 1 1 to the point of exit. Pure cold air is constantly and liberally supplied through the pipe 10 and inlet 38 to supplant that which is carried off in a heated state through the pipes connected with the collars 19. The interior of the furnace-box is readily accessible for the purpose of igniting the gas when the latter has been turned on.

This improved gas-furnace is highly elficient in practice, and a furnace of moderate size will be found eflicient to heat a comparatively large dwelling. The device requires practically no attention beyond merely igniting and extinguishing the flames and regulating the air-supply, which latter is accomplished by simply moving the stop 25 outward or inward in the tube 23, as may be required.

It will be seen that by the radiating-drums constructed as herein described the products of combustion will be compelled to pass in a circuitous course to the point of final exit, so that the greatest possible percentage of heat units will be utilized. It is desired to be understood, however, that the radiating means for conducting the products of combustion to the point of exit may be changed within the scope of the invention.

Having thus described the invention, what is claimed is- In a gasfurnace, a furnace-casing having hot-air exits and a cold-air inlet, a furnacebox within the casing, said box having a conical top provided at its apex with an annular flange, a plurality of radiating-drums suitably connected with each other, one'of said drums having an opening surrounded by a depending flange engaging the flange at the apex of the furnace-top and braces connected with sockets upon said furnace-top, an exit-pipe depending from one of the radiating-drums and extending through the wall of the casing to a point of final exit, communicating openings in the casingand the furnace-box, means for regulating the admission of air into the latter, and a gas-burner within the furnacebox.

In testimony that I claim the foregoing as my own 1 have hereto aflixed my signature in the presence of two witnesses.

DENIS D. HUGHES.

itnesses:

O. W. Jones, TV. A. CURRY. 

